Can we scale out TiKV during the index addition DDL process?

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 大佬们加索引DDL过程中可以扩容tikv吗？

| username: jaybing926

Can TiKV be scaled out during the process of adding an index DDL in TiDB?

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| username: tidb狂热爱好者 | Original post link

Expansion is possible.

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| username: jaybing926 | Original post link

Awesome, you’re amazing!

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| username: zhanggame1 | Original post link

DDL execution does not affect scaling. The newly added TiKV initially contains no data.

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| username: jaybing926 | Original post link

Awesome!

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| username: 像风一样的男子 | Original post link

You can scale out, but you cannot upgrade the version while executing DDL.

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| username: wangccsy | Original post link

Executing DLL does not affect storage.

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| username: andone | Original post link

It is possible to scale out during DDL.

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| username: Jellybean | Original post link

The task of adding DDL is persisted to the storage layer and is scheduled and executed by the DDL owner. Not only expansion but also contraction will not affect the execution of DDL (provided there are enough remaining nodes).

In the version mentioned by the original poster, the version cannot be upgraded while executing DDL.
In the latest version v7.5.0, DDL can be paused and resumed. Upgrading the version while DDL is executing will not be affected; the background will automatically pause and resume after the upgrade. Usability and management capabilities have been greatly improved.

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| username: dba远航 | Original post link

Expansion is possible.

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| username: system | Original post link

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